/Engine/Source/Runtime/Engine/Public/HLSLTree/HLSLTree.h
Creates a new FExpression-derived type by passing the given arguments to the constructor Given arguments are hashed, and may result in returning an existing expression if the hash matches
template<typename T, typename... ArgTypes> const [FExpression](API\Runtime\Engine\HLSLTree\FExpression) * NewExpression ( ArgTypes &&... Args )